njrat | c740586e78ab04f96c4e45defcc6c6f7a2452449d4b076958eb0db77ed618fb3

General

Target

Server.exe
Size

43KB
MD5

6fd38643354ce9c9af962154cd79c03e
SHA1

e7716fa97f92addc3482db44f08125745d35ce92
SHA256

ded006de19d1f8888efbac3b6088acca5a1f2bf3e9aceb0bf4a68508a9356c5b
SHA512

752cbdbccfb479fc03fc4386bc588c49ff4cc766cfda41840dfa3af2cd418d76ad3135fd499f558f6e1973f4494d20ba579832010aacf8557e29f29e2ea54546
SSDEEP

384:THZyT36Nkli0yizcpSQOWpeMVOaEnxqzVmzkIij+ZsNO3PlpJKkkjh/TzF7pWn15:T5R6ABiopSQOWpeeOxMiuXQ/oQUM+L

Score

10^/10

njrat ???? 10 ??? ?????? discovery persistence trojan

Malware Config

Extracted

Family

njrat

Version

Njrat 0.7 Golden By Hassan Amiri

Botnet

???? 10 ??? ??????

C2

0.tcp.ngrok.io:10940

Mutex

Windows Update

Attributes

reg_key
Windows Update
splitter
|Hassan|

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	Server.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exe	System.exe

Executes dropped EXE 1 IoCs

pid	Process
4620	System.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Users\\Admin\\AppData\\Roaming\\System.exe\" .."	System.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Update = "\"C:\\Users\\Admin\\AppData\\Roaming\\System.exe\" .."	System.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
26	0.tcp.ngrok.io
48	0.tcp.ngrok.io
69	0.tcp.ngrok.io
78	0.tcp.ngrok.io

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	System.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
4908	Server.exe
4620	System.exe

Suspicious use of AdjustPrivilegeToken 35 IoCs

description	pid	Process
Token: SeDebugPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe
Token: 33	4620	System.exe
Token: SeIncBasePriorityPrivilege	4620	System.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4908 wrote to memory of 4620	4908	Server.exe	92
PID 4908 wrote to memory of 4620	4908	Server.exe	92
PID 4908 wrote to memory of 4620	4908	Server.exe	92

C:\Users\Admin\AppData\Local\Temp\Server.exe
"C:\Users\Admin\AppData\Local\Temp\Server.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:4908
- C:\Users\Admin\AppData\Roaming\System.exe
  "C:\Users\Admin\AppData\Roaming\System.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:4620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\System.exe

Filesize
43KB

MD5
6fd38643354ce9c9af962154cd79c03e

SHA1
e7716fa97f92addc3482db44f08125745d35ce92

SHA256
ded006de19d1f8888efbac3b6088acca5a1f2bf3e9aceb0bf4a68508a9356c5b

SHA512
752cbdbccfb479fc03fc4386bc588c49ff4cc766cfda41840dfa3af2cd418d76ad3135fd499f558f6e1973f4494d20ba579832010aacf8557e29f29e2ea54546

Download Submit
memory/4620-17-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/4620-16-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/4620-19-0x00000000059B0000-0x00000000059BA000-memory.dmp

Filesize
40KB

Download
memory/4620-20-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/4620-21-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/4908-2-0x00000000058C0000-0x000000000595C000-memory.dmp

Filesize
624KB

Download
memory/4908-3-0x0000000006200000-0x00000000067A4000-memory.dmp

Filesize
5.6MB

Download
memory/4908-4-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/4908-5-0x0000000005C50000-0x0000000005CE2000-memory.dmp

Filesize
584KB

Download
memory/4908-1-0x0000000000E60000-0x0000000000E72000-memory.dmp

Filesize
72KB

Download
memory/4908-15-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/4908-0-0x000000007533E000-0x000000007533F000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads